Răspuns :
c = b -120
2a + b + c = 2a + b + b -120 = 2a + 2b - 120 = 2· ( a +b) - 120 =
= 2 · 866 - 120 = 1732 - 120 =1612
2a + b + c = 2a + b + b -120 = 2a + 2b - 120 = 2· ( a +b) - 120 =
= 2 · 866 - 120 = 1732 - 120 =1612
a+b=866
c=b-120
2a+b+c=2a+b+b-120=
2a+2b-120=2(a+b)-120=
2×866-120=1732-120=1612
c=b-120
2a+b+c=2a+b+b-120=
2a+2b-120=2(a+b)-120=
2×866-120=1732-120=1612